Cross study of seismic hazard indicators in environmental and social sciences : application to the Tetouan area (Morocco)
The Mediterranean basin is subject to plethora of natural hazards either related to geology or geomorphology (earthquakes, landslides, coastlines changes) or global changes (floods, droughts, erosion, forest fire, water resource). Environmental vulnerability measure estimation must take into account risk indicators from both geophysical processes characterisation and societal perception. Within the context of this internship we therefore propose to apply an interdisciplinary approach to the Tetouan region facing seismic risk.
The purpose of this internship is to establish a comparison of risk indicators linked with the earthquake hazard in the fields of environmental sciences (ground mapping, geodynamic studies, hazard statistic, …) and social sciences (population vulnerability parameters and living conditions, perception and representation of the risks, impacts, prevention and resilience, governance). The purpose of this internship is also to propose a synthesis of the two sets of indicators in a spatial modeling of the Tetouan area.
Specific objectives :
- Carrying out a review of existing knowledge on environmental and socio-economic indicators of natural risk
- Searching for relevant indicators in the study area
- Collecting existing information on the study area and analysing reported indicators
- Integrating these indicators into a GIS database
The applicant will contribute to the information gathering of existing data (from database, historical data) and will participate to an interdisciplinary field trip in the study area.
Master 2 in geography, GIS skills, geomatic, knowledge in environmental sciences.
LPED, Aix-Marseille Université, Site St Charles, Marseille
5 month (from february to june 2016)
Supervisors : H. Mazureck, O. Bellier
Supervising team : O. Bellier, H. Mazureck, L. Arreghini, R. Suarez, L. Vidal
Marine submersion analysis of mediterranean and atlantic low seacoasts of the tingitane peninsula
At the low seacoast level such as the targeted beaches the marine submersion risk due to storms is higher. In addition these low seacoasts are concentrating economic activities linked to the coastal area. It is necessary to assess the possible impact of a storm in order to establish effective contingency plans.
The main objective of this project is to develop a better understanding of the atmospheric, marine weather and hydro sedimentary processes involved in the low seacoast marine submersion events in the Tanger-Tetouan region. To do so, an historical inventory of the marine submersion recorded events and their corresponding atmospheric and hydro sedimentary conditions is required. In addition it is necessary to study the runup phenomenon and its related processes with in situ measures from the selected pilot areas. Finally, the marine submersion risk issue will be covered through an applied research approach.
In order to perform the runup measures 4 beaches concentrating most of the socio-economic activities will be chosen, 2 on the mediterranean coastline ( Martil and M’diq ) and 2 on the atlantic coastline ( south of Tanger and Asilah ).
The working methodology will be focused around 3 elements: morphological, marine weather and extreme level aspects.
Topographic measurements of the intertidal zone will be carried out in order to infer the beach slope which is the morphological element for the runup calculation (Komar, 1998).
Marine weather aspect
Characterizing the triggering agents of the phenomenon: swell, tide, atmospheric pressure and wind.
Extreme sea level
The water mark elevation represents the uprush maximum level and is a good runup indicator (Fletcher et al.,1995 ; Bush et al., 2001 ; FEMA, 2006 ; Moore et al, 2006). We can use the following formula:
water mark elevation = high tide elevation observed + Rmax
submersion risk, low seacoast, atmospheric condition, hydrodynamic, tingitane peninsula.
Abdelmounim EL MRINI
Département de Géologie, Faculté des Sciences
Univ. Tanger-Tétouan, Morocco
mail : firstname.lastname@example.org
CEREGE, Aix-Marseille Université, France
mail : email@example.com